Sign In

Don't have a Xilinx account yet?

  • Choose to receive important news and product information
  • Gain access to special content
  • Personalize your web experience on Xilinx.com

Create Account

Username

Password

Forgot your password?
XClose Panel
Xilinx Home
Reply
nc6
Contributor
nc6
Posts: 40
Registered: ‎05-07-2009
0
Accepted Solution

20MHz to 100Mhz using DCM in Virtex 4

Hi all,

 

I am using a custom board with a  Virtex 4 lx 100 1148 -10 FPGA on it. A clock of 20MHz comes in through a IO pin which is not a Global clock IO location. I am passing this clock through a DCM through a IBUFG and trying to get 100MHz clock at the CLKFX output of the DCM. However when i measure the frequency at the CLKFX using another pin, i see that it is 20MHz and not 100MHz. what settings i need to do to get 100MHz output. I tried both low frequency mode and high frequency mode setting in the EDK. I am using EDK 9.1i tool set.

 

Thanks.

nc6
Contributor
nc6
Posts: 40
Registered: ‎05-07-2009
0

Re: 20MHz to 100Mhz using DCM in Virtex 4